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Norwich

Polluted by sewage 283 times in 2025 lasting 1,019 hours

Monitoring fell below 50% in some locations so could be more

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Totals for Norwich in 2025

22 Sites polluted by Anglian Water

283 sewage dumps

1,019 hours duration

That's 1.42 months. 5.4 times a week, on average

Change Over Time

Constituency for Norwich

Nearby Constituencies

Waterways in Norwich

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Pollution Summary 2025

Here are all the reported sewage overflow totals for Norwich in 2025. Sometimes sewage can be being dumped for months at a time.

Reporting refers to how much of the time the monitoring was active. In this place 3 of the total 27 CSO Combined Sewage Overflow - a device that, when operating, pours combined rainwater & sewage into a waterway locations had reporting enabled for less than half the year.

Company	Waterway	Site	Sewage Dumps	Duration (Hours)	Reporting %
Anglian Water	.	ELM HILL OVERFLOW	70	643	100
Anglian Water	River Wensum	NORWICH CEDAR ROAD CSO	11	96	18.9
Anglian Water	River Yare	TROWSE TERMINAL PUMPING STATION	15	51	100
Anglian Water	River Wensum	NORWICH - KETTS HILL CSO	35	50	94.6
Anglian Water	River Wensum	DRAYTON RD NO 3/BOOTBINDER ROAD CSO	16	43	85.5
Anglian Water	River Yare	NORWICH SANDY LANE CSO	24	35	67.8
Anglian Water	River Wensum	GIBRALTAR GARDENS CSO	8	28	95.3
Anglian Water	River Wensum	KING STREET COMBINED SEWER OVERFLOW	26	23	99.7
Anglian Water	Dobbs Beck, River Bure	RACKHEATH WATER RECYCLING CENTRE	4	16	99.9
Anglian Water	River Wensum	NORWICH - KING STREET #2 CSO	20	9	97.8
Anglian Water	River Wensum	NORWICH LOWER CLOSE (FERRY LN) CSO	11	7	99.7
Anglian Water	Tidal River Yare	WHITLINGHAM WATER RECYCLING CENTRE	1	3	100
Anglian Water	River Wensum	NORWICH - PRINCE OF WALES ROAD CSO	7	2	100
Anglian Water	River Wensum	NORWICH - RIVER LANE CSO	6	2	100
Anglian Water	River Wensum	NORWICH CARROW ROAD CSO	3	2	20.2
Anglian Water	River Wensum	SCHOOL LANE / BEDFORD STREET CSO	4	1	39
Anglian Water	River Wensum	NORWICH ST FAITHS LANE CSO	6	1	100
Anglian Water	River Wensum	NORWICH - BARRACK STREET CSO	3	1	89.7
Anglian Water	River Wensum	NORWICH ANGEL ROAD CSO	7	0	83
Anglian Water	River Wensum	NORWICH - CHALK HILL ROAD CSO	2	0	100
Anglian Water	River Wensum	NORWICH - ROSARY ROAD CSO	2	0	100
Anglian Water	River Wensum	NORWICH RECORDER ROAD CSO	2	0	99.8
Anglian Water	River Wensum	NORWICH OAK LANE CSO	0	0	92.1
Anglian Water	River Yare	BRACONDALE COMBINED SEWER OVERFLOW	0	0	99.1
Anglian Water	River Wensum	NORWICH - ELM HILL CSO	0	0	99.9
Anglian Water	River Wensum	NORWICH - NEW MILLS CSO	0	0	99.3
Anglian Water	River Wensum	NORWICH COW TOWER CSO	0	0	100

Data Sources & Accuracy

EDM (Event Duration Monitoring) data and Consented Discharges to Controlled Waters with Conditions from Environment Agency & Data Map Wales, and Scottish Water

Experimental derived data from Thames Water API, Some data may be missing or inaccurate. Live sewage data from Stream Water API

Uses Environment Agency rainfall data from the real-time data API (Beta) - Rainfall data is delayed by up to two days.

This website is intended to provide an accurate representation of the Environment Agency data. The data is hard to use, and thus some errors may have been made. If you find something that is incorrect, please raise an issue at the GitHub issues page and we'll endeavour to fix it quickly.

This project is not associated, approved or endorsed by any of the companies whose logos you see here.

Analysing sewage pollution by the Water Industry

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